Which drawing shows a 3D body with dimensions along each axis true to scale?

Which drawing shows a 3D body with dimensions along each axis true to scale?

• A. Hipparchus
• B. Gelatin
• C. Isometric Diagram
• D. Analemma

Answer: (C)

The main idea here is using a drawing method that preserves true dimensions along all three axes in a single 2D representation. An isometric diagram does that by scaling the three principal directions equally, so lengths along the x, y, and z axes are true to size in the drawing. In an isometric view the three axes are shown at equal angles to one another (typically forming 120-degree angles), and all three directions are foreshortened by the same amount. This lets you read true lengths along any axis directly from the diagram, which is exactly what you need when dimensions along each axis must be true to scale. The other terms don’t describe a drawing method: one is an ancient astronomer, another is a gelatin substance, and the last is a sun-position figure used in celestial tracking. None of them convey a way to represent 3D dimensions with equal scale along all axes.

The main idea here is using a drawing method that preserves true dimensions along all three axes in a single 2D representation. An isometric diagram does that by scaling the three principal directions equally, so lengths along the x, y, and z axes are true to size in the drawing. In an isometric view the three axes are shown at equal angles to one another (typically forming 120-degree angles), and all three directions are foreshortened by the same amount. This lets you read true lengths along any axis directly from the diagram, which is exactly what you need when dimensions along each axis must be true to scale.

The other terms don’t describe a drawing method: one is an ancient astronomer, another is a gelatin substance, and the last is a sun-position figure used in celestial tracking. None of them convey a way to represent 3D dimensions with equal scale along all axes.